The swimming events at the 2025 World Aquatics Championships were held from 27 July to 3 August 2025 at the World Aquatics Championships Arena at the Singapore Sports Hub in Kallang, Singapore. Léon Marchand of France won the Male Swimmer of the Championships award and Summer McIntosh of Canada won the Female Swimmer of Championships award. The United States won the Team of the Championships award.
Each National Federation was permitted to enter a maximum of two qualified athletes in each individual event, but they could do so only if both of them had attained the "A" standard qualification time in the event at a World Aquatics certified competition between 9 March 2024 and 29 June 2025. Federations could enter one athlete into the event if they met the "B" standard qualification time. Athletes could also enter the event if they had met an A or B standard in a different event and their Federation had not entered anyone else.
Federations who had less than four swimmers who met standard qualification times could make up a quota of four by adding swimmers who had not met the standard qualification criteria, providing they maintained a balance in the gender of competing entrants. All these swimmers could enter up to two events each. For example, this meant Federations who had no swimmers who met any standard qualification times could enter at least two men and two women to the competition, all of whom could enter into up to two events.
Each National Federation could enter one team in each relay. The team had to be composed of swimmers who were also competing in the individual events, along with relay only swimmers who had to have met the B standard for the corresponding stroke and distance they would be swimming in the relay. Federations were only allowed to enter two relay-only swimmers for each relay they entered.
42 events will be held.
All times are local (UTC+8).
<small>M = Morning session (starting at 10:00), E = Evening session (starting at 19:00) â All times are local (UTC+8).</small>
<span style="font-size:95%"> Swimmers who participated in the heats only and received medals.</span>
<span style="font-size:95%"> Swimmers who participated in the heats only and received medals.</span>
The following world and championship records were set during the competition: